P03-620 (RTX3070) switch to bigger case

Amo_rphis

Hello everyone,
I recently bought an P03-620 with i7 10700,RTX 3070,32 gb RAM, 1Tb SSD. I tried all the upgrades about cooling, changed both intake and exhaust fans with Noctua A9 PWM, upgraded the cooler with Noctua U9S ; still the cooling and noise it's annoying,because the GPU , probably considering the bad airflow of this case, make a lot of noise ,GPU fans running high speed and noise while gaming. The only way to keep the cooling decent is with side panel opened, but then the noise became a problem more.
I have from my previous PC a very nice case(Cooler Master HAF 932) with a very good airflow. My plan is to move the components in this case, but I need some advices: 
1. Can you advice me how tho remove the Mainboard safe
2. I have to move PSU also(considering the particular connection with the mainboard), can you advise me if it's removable from the Predator case
3.There is a small component with Intel written on it, close to SATA connectors, with 2 wires black and white which go up and down along the case, and I don't know how to disconnect this and what are those wires role. I'll try to attach a picture with this one.

GotBanned

There are quite a few posts about doing what you are planning to do. It won't be easy, but it is doable. There are also some complications, as you will see if you search the forum.

1. mobo is attached with 6 screws. Before you can remove them and the board, you need to remove the front I/O support which can be seen in your picture above. That silver color thing. To do this you must remove the front panel. If I remember correctly, you will also need to remove the headphone stand but that has only two screws and it is easy to remove.
2. Remove all cables from the mobo and unscrew four screws from the back around the PSU.
3. That's your WiFi card. When removing those cables, be very careful as the connectors can easily break. Use thin pliers. Even putting them back is a bit of a pain as the connectors are that small and fragile.

There is a good guide with pictures about this process. Please search the forum and good luck!